Experiments on Cold-Formed Steel C-Section Joists with Unstiffened Web Holes

被引：54
|
作者：
Moen, Cristopher D. [1 ]
Schudlich, Anna [2 ]
von der Heyden, Aaron [2 ]
机构：
[1] Virginia Tech, Dept Civil & Environm Engn, Blacksburg, VA 24061 USA
[2] Tech Univ Darmstadt, Inst Stahlbau & Werkstoffmech, D-64285 Darmstadt, Germany
来源：
JOURNAL OF STRUCTURAL ENGINEERING-ASCE | 2013年 / 139卷 / 05期
关键词：
Holes; Perforations; Distortional buckling; Cold-formed steel; Direct strength method; FLEXURAL MEMBERS;
D O I：
10.1061/(ASCE)ST.1943-541X.0000652
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Experiments were conducted on cold-formed steel C-section joists with rectangular unstiffened web holes. The presence of holes decreased joist capacity and amplified distortional buckling deformation. Distortional buckling was accompanied by unstiffened strip buckling of the compressed web. When hole depth approached the web depth, sudden buckling of the compressed flange and web above the hole was observed. Critical elastic buckling moments for local, distortional, and global buckling were calculated for each specimen including the influence of holes with recently introduced engineering expressions and finite strip analysis. Forthcoming direct strength method equations for cold-formed steel joists with holes were demonstrated to be viable predictors of flexural capacity for the specimens considered in the experimental program. DOI: 10.1061/(ASCE)ST.1943-541X.0000652. (C) 2013 American Society of Civil Engineers.
引用
收藏
页码：695 / 704
页数：10
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